CD4 T cell-mediated alloresistance to fully MHC-mismatched allogeneic bone marrow engraftment is dependent on CD40-CD40 ligand interactions, and lasting T cell tolerance is induced by bone marrow transplantation with initial blockade of this pathway - Ito,H.; Kurtz,J.; Shaffer,J.; Sykes,M. (J Immunol, 2001)